PS Engineering PMA9000EX Installation Manual - Manual (Page 11)

PS Engineering
PMA9000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-920-0000 Page 2-4 Rev. 9, Jan. 2011
2.4.5.1 Speaker Load
The PMA9000EX contains one speaker amplifier. Some units with internal speaker amplifiers, such as
the King Radio KX170-series, require a resistive load to prevent damage if their speaker amplifier is not
used. Connect the speaker output from the unit to the COM 2 Speaker load input on the PMA9000EX (J1
27 WRT 28). The speaker load is 16 , 3W.
2.4.6 TELEPHONE (Duplex) Function for Cell Phones
The TELEPHONE mode in the PMA9000EX is also compatible with many cellular telephones with
hands-free headset interfaces, including Bluetooth®.
If a wired connection is desired, the front panel 3/32” utility jack can be used as the interface to the Cell
Phone, or a 3/32” jack can be installed somewhere on the aircraft panel. The wired interface jack is con-
nected with the PMA9000EX as shown: A patch cord (3/32” to 3/32”) is available from PS Engineering
under P/N 425-006-7026.
3/32" Cellular Jack
TEL Mic Input
TEL Audio
Audio Lo
Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
This is a typical interconnect
PS Engineering does not guarantee
compatability in all cases.
Cellular Phone
Interconnect
Figure 2 -1 Cellular telephone interface for rear connector, if an additional jack is desired
2.4.6.1 Cell phone Sidetone
As shipped from PS Engineering, the PMA9000EX does not provide cellular telephone sidetone (the
user’s voice fed back to the headset). Some cell phones do not have sidetone, which may result in loud or
distorted sidetone. If sidetone is desired, an internal modification can be made that will allow the
PMA9000EX to provide this sidetone. Contact PS Engineering for more information.
NOTE
FCC Regulations (47 CFR 22.925) prohibit airborne operation of cellular phones;
Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft must not
be operated while such aircraft are airborne (not touching the ground). When any aircraft leaves the
ground, all cellular telephones on board that aircraft must be turned off. The use of cellular telephones
while aircraft is on the ground is subject to FAA regulations.
FAA Regulation 14 CFR 91.21(5) allows for use of portable electronic devices that the operator of the
aircraft has determined will not cause interference with the navigation or communication system of the
aircraft on which it is to be used.
PS Engineering, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes
no responsibility for the user’s action. PS Engineering does not guarantee compatibility with personal
cellular telephones. For a list of phones that have been tested, visit
www.ps-engineering.com .
2.4.7 Transmit Interlock
Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode fea-
ture, this function must be disabled. Consult that manufacturer's installation ma nual.